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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/gtk/sad_tab_gtk.h"
#include <string>
#include "app/gfx/chrome_canvas.h"
#include "app/gfx/chrome_font.h"
#include "app/l10n_util.h"
#include "app/resource_bundle.h"
#include "base/gfx/size.h"
#include "base/lazy_instance.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "skia/ext/skia_utils.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
namespace {
// The y offset from the center at which to paint the icon.
const int kSadTabOffset = -64;
// The spacing between the icon and the title.
const int kIconTitleSpacing = 20;
// The spacing between the title and the message.
const int kTitleMessageSpacing = 15;
const SkColor kTitleTextColor = SK_ColorWHITE;
const SkColor kMessageTextColor = SK_ColorWHITE;
const SkColor kBackgroundColor = SkColorSetRGB(35, 48, 64);
const SkColor kBackgroundEndColor = SkColorSetRGB(35, 48, 64);
struct SadTabGtkConstants {
SadTabGtkConstants()
: sad_tab_bitmap(
ResourceBundle::GetSharedInstance().GetBitmapNamed(IDR_SAD_TAB)),
title_font(
ResourceBundle::GetSharedInstance().GetFont(
ResourceBundle::BaseFont).DeriveFont(2, ChromeFont::BOLD)),
message_font(
ResourceBundle::GetSharedInstance().GetFont(
ResourceBundle::BaseFont).DeriveFont(1)),
title(l10n_util::GetString(IDS_SAD_TAB_TITLE)),
message(l10n_util::GetString(IDS_SAD_TAB_MESSAGE)) {}
const SkBitmap* sad_tab_bitmap;
ChromeFont title_font;
ChromeFont message_font;
std::wstring title;
std::wstring message;
};
base::LazyInstance<SadTabGtkConstants>
g_sad_tab_constants(base::LINKER_INITIALIZED);
} // namespace
SadTabGtk::SadTabGtk()
: width_(0),
height_(0),
title_y_(0),
message_y_(0),
widget_(gtk_drawing_area_new()) {
gtk_widget_set_double_buffered(widget_.get(), FALSE);
g_signal_connect(widget_.get(), "expose-event",
G_CALLBACK(OnExposeThunk), this);
g_signal_connect(widget_.get(), "configure-event",
G_CALLBACK(OnConfigureThunk), this);
}
SadTabGtk::~SadTabGtk() {
widget_.Destroy();
}
// static
gboolean SadTabGtk::OnExposeThunk(GtkWidget* widget,
GdkEventExpose* event,
const SadTabGtk* sad_tab) {
return sad_tab->OnExpose(widget, event);
}
gboolean SadTabGtk::OnExpose(GtkWidget* widget, GdkEventExpose* event) const {
ChromeCanvasPaint canvas(event);
SkPaint paint;
paint.setShader(skia::CreateGradientShader(0, height_,
kBackgroundColor,
kBackgroundEndColor))->safeUnref();
paint.setStyle(SkPaint::kFill_Style);
canvas.drawRectCoords(0, 0,
SkIntToScalar(width_),
SkIntToScalar(height_),
paint);
const SadTabGtkConstants& sad_tab_constants =
g_sad_tab_constants.Get();
// Paint the sad tab icon.
canvas.DrawBitmapInt(*sad_tab_constants.sad_tab_bitmap,
icon_bounds_.x(),
icon_bounds_.y());
// Paint the "Aw, snap!"
canvas.DrawStringInt(sad_tab_constants.title,
sad_tab_constants.title_font,
kTitleTextColor,
0,
title_y_,
width_,
sad_tab_constants.title_font.height(),
ChromeCanvas::TEXT_ALIGN_CENTER);
// Paint the explanatory message.
canvas.DrawStringInt(
sad_tab_constants.message,
sad_tab_constants.message_font,
kMessageTextColor,
0,
message_y_,
width_,
99999, // Let the height be large, and we'll clip if needed.
ChromeCanvas::TEXT_ALIGN_CENTER |
ChromeCanvas::MULTI_LINE |
ChromeCanvas::TEXT_VALIGN_TOP);
return TRUE;
}
// static
gboolean SadTabGtk::OnConfigureThunk(GtkWidget* widget,
GdkEventConfigure* event,
SadTabGtk* sad_tab) {
return sad_tab->OnConfigure(widget, event);
}
gboolean SadTabGtk::OnConfigure(GtkWidget* widget, GdkEventConfigure* event) {
const SadTabGtkConstants& sad_tab_constants =
g_sad_tab_constants.Get();
width_ = event->width;
height_= event->height;
int icon_width = sad_tab_constants.sad_tab_bitmap->width();
int icon_height = sad_tab_constants.sad_tab_bitmap->height();
int icon_x = (event->width - icon_width) / 2;
int icon_y = ((event->height - icon_height) / 2) + kSadTabOffset;
icon_bounds_.SetRect(icon_x, icon_y, icon_width, icon_height);
title_y_ =
icon_bounds_.bottom() + kIconTitleSpacing;
int title_height = sad_tab_constants.title_font.height();
message_y_ =
title_y_ + title_height + kTitleMessageSpacing;
return TRUE;
}
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